Distribution of Todarodes pacificus (Cephalopoda: Ommastrephidae) paralarvae near the Kuroshio off southern Kyushu, Japan
Distribution of Todarodes pacificus (Cephalopoda: Ommastrephidae) paralarvae near the Kuroshio off southern Kyushu, Japan
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DOI：
10.1007/s002270050606
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发表时间：
1999-10-01
期刊：
影响因子：
2.4
通讯作者：
Sakurai, Y
中科院分区：
文献类型：
--
作者：
Bower, JR;Nakamura, Y;Sakurai, Y
研究了九州岛附近九州岛南部海域的日本普通鱿鱼[Todarodes pacphaus(Steenstrup，1880)]的分布和丰度与该地区水域类型的关系。1996年和1997年使用直径70厘米的成对邦戈蚊帐进行了调查。利用0、50和100m水深的温盐图，将采样点划分为三种水体类型：近岸、混合和黑潮。共在72个测点中的59个站采集到4103只太平洋毛滴虫。正站位的渔获密度在8至4282个/50m(2)海面面积之间。在这两年中，混合水域的渔获量最高，其次是近岸和黑潮水域。总渔获量最高的是位于黑潮近岸边缘的海洋锋面以北，并随着距离锋面越来越远而下降。小于或等于1.0 mm地幔长度的副翼捕获物也在前缘附近达到峰值。在这两年中，大于或等于85%的副翼和小于或等于1.0 mm的地幔长度的69%发生在距前缘不到25公里的地方。我们得出的结论是，九州西南部的大部分产卵发生在黑潮与近岸水域交汇的锋区附近。
The distribution and abundance of Japanese common squid [Todarodes pacificus (Steenstrup, 1880)] paralarvae off southern; Kyushu Island near the Ku-roshio were examined in relation to water types in the region. Surveys were conducted in 1996 and 1997 using paired, 70 cm diameter Bongo nets. Temperature-salinity plots from 0, 50 and 100 m depths were used to assign sampling stations to three water types: inshore, mixing and Kuroshio. In total, 4103 T. pacificus paralarvae were collected at 59 of 72 stations. Catch densities at positive stations ranged between 8 and 4282 ind./50 m(2) sea surface area. Catches during both years were highest in mixing waters, followed by inshore and Kuroshio waters. Total catches were highest just north of the oceanographic front at the inshore edge of the Kuroshio and declined with increasing distance away from the front. Catches of paralarvae less than or equal to 1.0 mm mantle length also peaked near the front. In both years, greater than or equal to 85% of all paralarvae and greater than or equal to 69% of those less than or equal to 1.0 mm mantle length occurred less than 25 km from the front. We conclude that most spawning off southwest Kyushu occurs near the frontal zone, where Kuroshio and inshore waters meet.